P&ID Symbols

PC = Pressure Controller

PI = Pressure Indicator

PR = Pressure Recorder 

PIC = Pressure Indicating Controller 

PRC = Pressure Recording Controller 

PSV = Pressure Safety Valve

PT = Pressure Transmitter

RV = Relief valve

LA = Level Alarm

LAH = Level Alarm High

LAL = Level Alarm Low

LC = Level Controller

LG = Level Glass

LI = Level Indicator

LIC = Level Indicating Controller

LRC = Level recording Controller

FC = Flow Controller 

FE = Flow Element 

FA = Flow Alarm

FE = Flow Element

FI = Flow Indicator

FR = Flow Recorder

FRC = Flow recorder Controller

FIC = Flow Indicator Controller

LC = Level Control

LG = Level Gauge

LA = Level Alarm

LAH = Level Alarm High

LAHH = Level Alarm High High

LI = Level Indicator

LIC = Level Indicator Controller

TA = Temperature Alarm

TI = Temperature Indicator

TR = Temperature recorder

TRC = Temperature recorder Controller

TW = Temperature Well

TY = Temperature Relay

TW = Thermowell

HCV = Hand Control Valve

SDV = Shut Down Valve

SDY = Shut Down Valve Relay

USD = Unit Shut Down